Until last week, Fletch (Chevy Chase) was just another mild mannered reporter fighting for the truth, justice and a window office. But things change when he goes undercover as a minor league junkie to trace some drug traffickers. Whilst on this assignment he meets Stanwyk (Tim Matheson) who says he is dying of bone cancer and asks Fletch to murder him, so that his wife will benefit from the insurance. Stanwyk it seems has arranged the perfect crime - a feigned robbery, a getaway Jaguar and a first class ticket to Rio... But something doesn't seem quite right. And as he dons various guises in an attempt to discover the truth, Fletch finds himself being threatened, shot at, accused and arrested. And that's by the people he's trying to help!